Diagnostics and Troubleshooting (EX342)

Red Hat Certificate of Expertise in RHEL

Prove your skills to analyze for common issues

The performance-based Red Hat Certificate of Expertise in Red Hat Enterprise Linux Diagnostics and Troubleshooting (EX342) tests your ability to analyze Red Hat® Enterprise Linux® systems for common issues that may cause degradation or loss of performance and either correct the issues or gather forensic information that can be passed along to a third party.

By passing this exam you earn a Red Hat Certificate of Expertise that also counts toward earning a Red Hat Certified Architect credential.

In preparation

Red Hat recommends that candidates earn Red Hat Certified Engineer (RHCE). Candidates should also so have some experience working with and troubleshooting Red Hat Enterprise Linux systems.

Study points for the exam

To help you prepare, the exam objectives highlight the task areas you can expect to see covered in the exam. Red Hat reserves the right to add, modify, and remove exam objectives. Such changes will be made public in advance.

Candidates for the Red Hat Certificate of Expertise in Linux Diagnostics and Troubleshooting should be able to:

Understand and employ general methods for troubleshooting

Collect system information to aid in troubleshooting

Consult documentation resources to aid in troubleshooting

Monitor systems for vital characteristics

Configure systems to send log messages to a centralized host

Diagnose and troubleshoot system start up issues

Identify and resolve service failures affecting boot

Regain root control of a system

Troubleshoot boot issues

Identify hardware and hardware problems

Manage kernel modules and their parameters

Diagnose and troubleshoot file system issues

Recover corrupted file systems

Recover mis-configured or broken LVM configurations

Recover data from encrypted file systems

Identify and fix iSCSI issues

Resolve package management issues

Resolve package management dependency issues

Recover a corrupted RPM database

Identify and restore changed files

Troubleshoot and fix network connectivity issues

Use standard tools to verify network connectivity

Identify and fix network connectivity issues

Inspect network traffic to aid troubleshooting

Diagnose application issues

Identify library dependencies for third-party software

Identify if an application suffers from memory leaks

Use standard tools to debug an application

Identify and fix issues related to SELinux

Identify and fix authentication issues

Identify and fix pluggable authentication module (PAM) issues

Identify and fix LDAP and Kerberos identity management issues

Gather information to aid third party investigation of issues

Create kernel crashdumps

Compile and execute SystemTap modules

Red Hat reserves the right to add, modify, and remove objectives. Such changes will be made public in advance through revisions to this document.

As with all Red Hat performance-based exams, configurations must persist after restart without intervention.